EP 1092690 B1 20050713 - Method of producing a cement with reduced content of chromium
Title (en)
Method of producing a cement with reduced content of chromium
Title (de)
Verfahren zur Herstellung von Zement mit niedrigem Chromgehalt
Title (fr)
Procédé de fabrication de ciment ayant une teneur réduite en chrome
Publication
Application
Priority
SK 141299 A 19991012
Abstract (en)
[origin: EP1092690A1] Present invention relates to the method of producing a cement with reduced content of chromium, where 0.01 to 10% by weight of mechanically and/or thermally treated iron carbonates are used as iron correction component for the raw meal, with its subsequent burning at the temperature from 1400 DEG C to 1500 DEG C, thus achieving primary reduction of Cr<VI> in cement between 0.5 and 20 ppm of Cr<VI>. Such prepared cement receives during and/or after grinding chemically treated - activated iron carbonates in amount of 0.01 to 1% by weight, thus achieving final reduction of Cr<VI> in cement less than 0,5 ppm.
IPC 1-7
IPC 8 full level
B09B 3/00 (2022.01); C04B 7/42 (2006.01); C04B 22/10 (2006.01)
CPC (source: EP)
C04B 7/425 (2013.01); C04B 22/10 (2013.01); C04B 2103/0014 (2013.01); C04B 2103/0096 (2013.01); C04B 2111/1075 (2013.01)
C-Set (source: EP)
Designated contracting state (EPC)
AT CH DE FR IT LI
DOCDB simple family (publication)
EP 1092690 A1 20010418; EP 1092690 B1 20050713; AT E299481 T1 20050715; CZ 2000114 A3 20020116; CZ 293588 B6 20040616; DE 60021240 D1 20050818; DE 60021240 T2 20060524; SK 141299 A3 20010510; SK 282086 B6 20011008
DOCDB simple family (application)
EP 00121532 A 20000930; AT 00121532 T 20000930; CZ 2000114 A 20000113; DE 60021240 T 20000930; SK 141299 A 19991012